And augustus



(No Model.)

G. M. STREET ER & A. D. SOHLESINGER.

TRUSS.

No. 413,152. Patented Oct. 15, 1889.

l/vi/bwmay @wa l i/ WWW WM N FEYERS. PhowLixhc m hu. Washington. D. C.

2 back a and a front or body a UNITED STATES PATENT OFFICE.

GEORGE M. STREETER, OF PHILADELPHIA, PENNSYLVANIA, AND AUGUSTUS D.SCHLESINGER, OF COLLEGE POINT, NEW YORK. I

TRUSS.

, SPECIFICATION forming part of Letters Patent No. 413,152, datedOctober 15, 1889.

Application filed April 26, 1889- Serial No. 303,765. (No model.)

To all whom it may concern.-

Be it known that we, GEORGE M. STREETER, of Philadelphia, in the countyof Philadelphia and State of Pennsylvania, and AU- 5 GUSTUS D.SOHLESINGER, of College Point, in Queens county and State of New York,have invented a certain new and useful Improvement in Pads for Trusses,of which the following is a specification.

I 0 Our improvement relates to pads for trusses,

supporters, and like articles.

We will describe a pad embodying our improvement, and then point out thenovel features in a claim.

In the accompanying drawings, Figure 1 is a front view of a padembodying our improvement. Fig. 2 is a back View. Fig. 3 is a side view.Fig. 4. is a central longitudinal section. Fig. 5 is a centrallongitudinal section of a pad of modified construction.

Similar letters of reference designate corresponding parts in all thefigures.

Referring first to Figs. 1 to 4, inclusive, A designates a pad composed,essentially, of a The front or body a is made of soft rubber and ofsemispheroidal shape. The back a is made of hard rubber. The two partsare secured together by having the soft-rubber front or body vulcanizedto the hard-rubber back. As here shown, the front or body a isa completebag and is vulcanized to the back a, entirely across the front surfaceof the latter. The back is shown as having a groove win the front 3 5surface in the edge portion, and the front or body is shown as extendinginto this groove and as being vulcanized therein. It may be sufficientto simply extend the front or body a into this groove a and vulcanize itthere.

In Fig. 5 we have shown a pad of slightly-different construction. Inthis example of our improvement the back neednot be of hard rubber, forit is covered with a sheet 'of soft rubber a and this sheet of softrubber a is vulcan- 45 ized to the front or body a and it may bevulcanized through perforations made in the back a, Where the back isnot made of hard rubber, and directly to the back when the back is madeof hard rubber. Obviously it can be made of metal or any other rigid ma-5o terial, and the rubber can be vulcanized directly to it, even when itis made of material other than hard rubber, by anchoring the rubber intoholes or recesses.

The essence of our improvement is a rigid back and a soft-rubber frontor body secured together by vulcanization of the rubber. In order togive strength to the back and to provide a proper length for the tappedhole a, the imperforate back is thickened at that part immediatelysurrounding the hole.

The pad is inflated with Water or air. The rigid back is providedwithatapped or screwthreaded hole a, for engagement with a spring orother fixture in atruss or like article; but this does not extend allthe Way through.

By the construction of pad described we dispense with all the necessityfor a textile covering. A textile covering is obj ectionable. The smoothsurface of soft rubbernext to the skin is preferable and is notabsorbent. Our pad is, moreover, cheaper than those of ordinaryconstruction.

\Vhat we claim as our invention, and desire to secure by Letters Patent,is

A pad having a metal back provided with a thickened portion for ascrew-socket extending partially through it, a soft-rubber front, asheet of soft rubber covering the back and vulcanized to the front, andthe rigid back being provided With'a groove in its edge for thereception of the edge of the soft rubber, substantially as specified.

GEO. M. STREETER. AUGUSTUS D. SOHLESINGER. Witnesses:

Tnos. J. HUNT, JOHN H. GEIL, T. M. GRELL, HENRY KRAEMER.

